You can add extra lines to your commit messages by adding an extra `-m` flag to the `git commit` flag. This is useful if you have extra information that you want captured in your commit, but you don't want it in your commit message header. For example:
```
git commit -am "Updates the README with copyright information" -m "This conforms to requirements from Legal."
```
Will produce the following commit message:
```
Updates the README with copyright information
This conforms to requirements from Legal.
```
Now your commit message is split up into a **header** and a **body**. You can also add another `-m` flag for a **footer**.